Andrew Winston, founder of Winston Eco-Strategies and coauthor of "Green to Gold."

Scott Cook, cofounder and chairman of the executive committee at Intuit.

Holly Weeks, communication consultant and author of "Failure to Communicate: How Conversations Go Wrong and What You Can Do to Right Them."

Lew McCreary, HBR senior editor and author of the article "What Was Privacy?"

Walter Kiechel, former managing editor at Fortune magazine.

Hal Sirkin, senior partner and managing director at The Boston Consulting Group and coauthor of "Globality."

Scott Anthony, president of Innosight.

Featuring the ideas of Tom Davenport, Rosabeth Moss Kanter, John Baldoni, and Annie McKee.

Joseph Pine and James Gilmore, founders of Strategic Horizons LLP and authors of "Authenticity: What Consumers Really Want."

Jeffrey Cohn, consultant at Spencer Stuart and coauthor of the HBR article "Finding and Grooming Breakthrough Innovators."

Clay Christensen, Harvard Business School professor and coauthor of the HBR article "Reinventing Your Business Model."

Tammy Erickson, McKinsey Award-winning author.

Featuring the ideas of Vineet Nayar, Jeff Stibel, and Stewart Friedman.

Michael Watkins, cofounder of Genesis Advisers and author of the HBR article "Picking the Right Transition Strategy."

Annie McKee, founder of the Teleos Leadership Institute and coauthor of "Becoming a Resonant Leader."

Marshall Goldsmith, executive coach and author of "Succession: Are You Ready?"

David Rhodes, global leader of The Boston Consulting Group's Financial Institutions Practice.

Barbara Kellerman, lecturer at the Harvard Kennedy School and author of "Followership: How Followers Are Creating Change and Changing Leaders."

Sydney Finkelstein, Tuck School of Business professor and author of "Why Smart Executives Fail: And What You Can Learn from Their Mistakes."

Colonel Tom Kolditz, professor and head of the department of Behavioral Sciences and Leadership at the U.S. Military Academy at West Point.

Paul Krugman, Nobel Prize-winning economist and op-ed columnist for The New York Times.

Bronwyn Fryer, HBR senior editor and author of the case study "The Layoff."

Philip Lay and Todd Hewlin, managing directors at TCG Advisors and coauthors of the HBR article "In a Downturn, Provoke Your Customers."

John Quelch, Harvard Business School professor and coauthor of the HBR article "How to Market in a Downturn."

Henry Mintzberg, professor of management at McGill University.

Paul Levy, president and CEO of Beth Israel Deaconess Medical Center in Boston.

Umair Haque, director of the Havas Media Lab.

Rita McGrath, Columbia Business School professor and coauthor of "Discovery-Driven Growth."

Dick Beatty, professor of human resource management at Rutgers University and coauthor of "The Differentiated Workforce."

Ann Livermore, executive vice president of Hewlett-Packard's Technology Solutions Group.

Claudio Fernández-Aráoz, senior adviser at Egon Zehnder International and coauthor of the HBR article "The Definitive Guide to Recruiting in Good Times and Bad."

Bill Drayton, founder and CEO of Ashoka.

Paul Osterman, professor at the MIT Sloan School of Management and author of "The Truth About Middle Managers."

Bob Sutton, professor of management science and engineering at Stanford University and author of the HBR article "How to Be a Good Boss in a Bad Economy."

Dave Ulrich, cofounder of the RBL Group and coauthor of "The Leadership Code: Five Rules to Lead By."

Ira Kay and Anne Sheehan, executive compensation debaters.

Bob Seelert, chairman of Saatchi & Saatchi and author of "Start with the Answer: And Other Wisdom for Aspiring Leaders."

David Silverman, author of "Typo: The Last American Typesetter or How I Made and Lost 4 Million Dollars."

Niall Ferguson, professor of history at Harvard University and professor of business administration at Harvard Business School.

Richard Bohmer, physician, Harvard Business School professor, and author of "Designing Care: Aligning the Nature and Management of Health Care."

Darrell Rigby, partner at Bain & Company and author of "Winning in Turbulence."

Ron Heifetz, founder of the Center for Public Leadership at the Harvard Kennedy School and coauthor of "The Practice of Adaptive Leadership."

Sylvia Ann Hewlett, founding president of the Center for Work-Life Policy and coauthor of the HBR article "How Gen Y and Boomers Will Reshape Your Agenda."

Gary Pisano, Harvard Business School professor and coauthor of the HBR article "Restoring American Competitiveness."

Featuring the ideas of Jeff Stibel, Dan Gillmor, and Tom Davenport.

Paul Hemp, HBR contributing editor and author of the HBR article "Death by Information Overload."

Roberto Verganti, professor of management of innovation at Politecnico di Milano and author of "Design Driven Innovation."

Stewart Friedman, Wharton School professor and author of "Total Leadership: Be a Better Leader, Have a Richer Life."

Gareth Jones, fellow of the Centre for Management Development at London Business School and coauthor of "Clever."

Cesare Mainardi, managing director of Booz & Company and coauthor of "Cut Costs, Grow Stronger."